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采用技术手段保护音像制品知识产权，有效地防止转录或盗版，具有重要意义。本文分析了电视信号防记录的原理，并重点介绍电视信号防记录机及防拷贝录像带制作系统。
The use of technical means to protect the intellectual property rights of audio-video products and effectively prevent transcription or piracy is of great significance. This paper analyzes the principle of TV signal anti-record, and focuses on TV signal anti-record and copy-tape production system.